feat(desktop): make portals installation configurable

hosts/work/home-config.nix

@@ -42,6 +42,7 @@
           inputFilename = "temp1_input";
         };
       };
+      xdg.useDistributionPortals = true;
     };
     web.firefox = {
       enable = true;

modules/home-manager/desktop/sway/default.nix

@@ -23,6 +23,16 @@ in
       '';
     };
 
+    xdg.useDistributionPortals = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        This prevent installing xdg-desktop-portal from nixpkgs. These
+        Useful when using Home-Manager on third-party distribution with old
+        version of portals (coucou Ubuntu LTS)
+      '';
+    };
+
     wallpapers = {
       lockscreen = mkOption {
         type = types.str;
@@ -170,16 +180,16 @@ in
         desktop = "${config.home.homeDirectory}/documents";
         publicShare = "${config.home.homeDirectory}/tmp/public";
       };
-      portal = {
+      portal = mkIf (cfg.xdg.useDistributionPortals == false) {
         enable = true;
         extraPortals = with pkgs; [
-          xdg-desktop-portal
           xdg-desktop-portal-wlr
           xdg-desktop-portal-gtk
         ];
         xdgOpenUsePortal = true;
         config = {
-          sway.default = [
+          sway = {
+            default = [
                 "wlr"
                 "gtk"
             ];
@@ -187,4 +197,15 @@ in
         };
       };
     };
+    
+    # When using `useDistributionPackage`, create wlr configuration to let user
+    # choose the right screen. This is a workarount to not have to configure
+    # it manually.
+    home.file."${config.xdg.configHome}/xdg-desktop-portal-wlr/config".text = mkIf cfg.xdg.useDistributionPortals ''
+      [screencast]
+      max_fps=30
+      chooser_type=simple
+      chooser_cmd=${pkgs.slurp}/bin/slurp -f %o -or
+    '';
+  };
 }